package com.ledi.guns.core.config;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.serializer.ValueFilter;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter4;

/**
 * fastjson配置类
 *
 * @author fengshuonan
 * @date 2017-05-23 22:56
 */
@Configuration("defaultFastjsonConfig")
@ConditionalOnClass(com.alibaba.fastjson.JSON.class)
@ConditionalOnMissingBean(FastJsonHttpMessageConverter4.class)
@ConditionalOnWebApplication
public class DefaultFastjsonConfig {

	@Bean
	public FastJsonHttpMessageConverter4 fastJsonHttpMessageConverter() {

		FastJsonHttpMessageConverter4 converter = new FastJsonHttpMessageConverter4();
		converter.setFastJsonConfig(fastjsonConfig());
		converter.setSupportedMediaTypes(getSupportedMediaType());
		return converter;
	}

	/**
	 * fastjson的配置
	 */
	public FastJsonConfig fastjsonConfig() {

		FastJsonConfig fastJsonConfig = new FastJsonConfig();
		fastJsonConfig.setSerializerFeatures(
				SerializerFeature.PrettyFormat,
				SerializerFeature.WriteMapNullValue,
				SerializerFeature.DisableCircularReferenceDetect
				);
		fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
		ValueFilter valueFilter = new ValueFilter() {

			@Override
			public Object process(Object o, String s, Object o1) {

				if (null == o1) {
					o1 = "";
				}
				return o1;
			}
		};
		fastJsonConfig.setCharset(Charset.forName("utf-8"));
		fastJsonConfig.setSerializeFilters(valueFilter);
		return fastJsonConfig;
	}

	/**
	 * 支持的mediaType类型
	 */
	public List<MediaType> getSupportedMediaType() {

		ArrayList<MediaType> mediaTypes = new ArrayList<>();
		mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
		return mediaTypes;
	}

}
